NCIS: Los Angeles Season 1 Episode 4

Ex-marine Walton Monroe Flynn is an employee of a large security company, Citdential, which is a US government-contracted firm in Iraq. Flynn killed their Iraqi business client Nasir Amini. While trying to apprehend them at LA airport, Citdential agent Aimes was fatally ran over. Callen's team started the investigation with CEO Peter Caldwell, who refers to Flynn as unstable. He had a rotten youth who found structure in the army. He received many commendations. He probably came to LA looking for his foster brother Chad Ellis, a gun shop owner, who is found tortured to death at his store. The next clue is a tattoo he shared with hippie former schoolmate Cherise Dawson. Callen infiltrates her life disguised as colleague in a software firm.